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Polyurethane useful for orthopedics external fixing system in complex environment and preparation method thereof

a technology of polyurethane and fixing system, applied in the field of polyurethane, can solve the problems of inability to harden the fixing system, too fast hardening of the fixing system, and excessive heat generation, and achieve the effect of effectively overcoming the problem

Active Publication Date: 2015-11-05
ZHU XIEPING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a polyurethane that can be used for external fixation of orthopedics. The polyurethane has good rigidity and intensity, and is sanitary and convenient to clean and process the skin. Compared to metal stents, polymer bandages or plasters, polyurethane has better fixation effect and does not result in infections or secondary hurts. When attached to the skin, polyurethane induces cardiovascular diseases without causing higher temperature and different shaping durations can be selected to avoid inducing cardiovascular diseases. Overall, polyurethane is a cost-effective and efficient solution for external fixation of orthopedics.

Problems solved by technology

However, in poor conditions, for example, in the field at a low temperature, where no hospitals are available, and the temperature is about 5-15° C., the fixation system cannot be hardened by the polyurethane; whereas in the temperature of 25-30° C., the hardening of the fixation system is too fast and produces too much heat.

Method used

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  • Polyurethane useful for orthopedics external fixing system in complex environment and preparation method thereof
  • Polyurethane useful for orthopedics external fixing system in complex environment and preparation method thereof
  • Polyurethane useful for orthopedics external fixing system in complex environment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034]Preparation of a modified isocyanate: a polyphenylene polymethylene isocyanate and a polyether glycol were mixed, and a reaction was carried out at a temperature of 70-90° C. to obtain the modified isocyanate.

[0035]Preparation of a polyether polyol mixture: 60 weight parts of a polyether polyol, 0.5 weight part of triethylene diamine, 1 weight part of a silicone stabilizer, 0.5 weight part of water, 37 weight parts of calcium carbonate, and 1 weight part of silica were collected and mixed to obtain the polyether polyol mixture.

[0036]Preparation of a polyurethane: the polyether polyol mixture and the modified isocyanate are mixed according to a ratio of 1:0.6 to obtain the polyurethane.

example 2

[0037]Preparation of a modified isocyanate is the same as that of Example 1.

[0038]Preparation of a polyether polyol mixture: 61 weight parts of a polyether polyol, 1 weight part of triethylene diamine, 2 weight parts of a silicone stabilizer, 0.1 weight part of water, 35.4 weight parts of calcium carbonate, and 0.5 weight part of silica were collected and mixed to obtain the polyether polyol mixture.

[0039]Preparation of a polyurethane: the polyether polyol mixture and the modified isocyanate are mixed according to a ratio of 1:0.65 to obtain the polyurethane.

example 3

[0040]Preparation of a modified isocyanate is the same as that of Example 1.

[0041]Preparation of a polyether polyol mixture: 62 weight parts of a polyether polyol, 0.3 weight part of triethylene diamine, 2 weight parts of a silicone stabilizer, 2 weight parts of water, 33 weight parts of calcium carbonate, and 0.7 weight part of silica were collected and mixed to obtain the polyether polyol mixture.

[0042]Preparation of a polyurethane: the polyether polyol mixture and the modified isocyanate are mixed according to a ratio of 1:0.65 to obtain the polyurethane.

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Abstract

A polyurethane used for orthopedics external fixing system in complex environment is obtained by reaction of mixture of polyether polyol with modified isocyanate in the weight ratio of 1:0.6-0.75. The modified isocyanate is obtained by reaction of polyphenylene polymethylene isocyanate with polyether glycol. The components and corresponding weight percent amounts of the mixture of polyether polyol are as follows: 60-65% polyether polyol; 0.3-1% catalyst; 0.1-2% foam stabilizer; 0.1-2% or 3-20% foaming agent; 25-40% filler and 0.5-2% functional auxiliary agent. The method of producing the polyurethane is also provided.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part of U.S. application Ser. No. 13 / 814,503, filed on Feb. 5, 2013, now pending, which is a National Stage Appl. filed under 35 USC 371 of International Patent Application No. PCT / CN2010 / 000785 with an international filing date of Jun. 2, 2010, designating the United States, and further claims priority benefits to Chinese Patent Application No. 200910052379.X filed Jun. 2, 2009. Inquiries from the public to applicants or assignees concerning this document or the related applications should be directed to: Matthias Scholl P.C., Attn.: Dr. Matthias Scholl Esq., 245 First Street, 18th Floor, Cambridge, Mass. 02142.FIELD OF THE INVENTION[0002]The invention relates to a polymer material and a preparation method thereof, and more particularly to a polyurethane for an external fixation system for orthopedics and a method for preparing the same.BACKGROUND OF THE INVENTION[0003]Chinese Patent Application No. ...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/48C08G18/20
CPCC08G18/7671C08G2101/0083C08G18/48C08G18/2063A61L15/12C08G18/1816C08G18/2081C08G18/4829C08G18/4883C08G18/7664C08J9/144C08J2203/142C08J2375/04C08K3/26C08K3/36C08K2003/265C08K2003/3045C08G2110/0025C08G2110/0083C08G18/10C08L75/08C08L67/04C08G18/20
Inventor ZHU, XIEPING
Owner ZHU XIEPING